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horseshoe crab

noun
1.
a large marine arthropod, Limulus polyphemus, of shallow coastal waters of eastern North America and eastern Asia, having both compound and simple eyes, book gills, a stiff tail, and a brown carapace curved like a horseshoe: a living fossil related to the woodlouse.
Also called king crab.
Origin
1765-1775
1765-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for horseshoe crab
  • Chances are you owe your life to the horseshoe crab.
  • Some other living fossils include the coelacanth, the horseshoe crab, and the nautilus.
  • horseshoe crab eggs provide an important food source for migrating shorebirds.
  • The goal for this lesson is for students to learn more about the horseshoe crab as a valuable resource in an estuary.
  • Hundreds of thousands of shorebirds converge on this ecologically significant region to feast on the eggs of the horseshoe crab.
  • horseshoe crab blood can also be used to help human blood to clot.
  • Participating teachers were provided with the raising equipment, an activity guide and horseshoe crab eggs.
  • The horseshoe crab, actually an arthropod, makes its home around the shore and marshes.
  • The table below lists the times and dates for the day and night horseshoe crab surveys for this year.
  • The horseshoe crab is used in vision studies, because their complex eye structure is similar to the human eye.
British Dictionary definitions for horseshoe crab

horseshoe crab

noun
1.
any marine chelicerate arthropod of the genus Limulus, of North America and Asia, having a rounded heavily armoured body with a long pointed tail: class Merostomata Also called king crab
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Difficulty index for horseshoe crab

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Word Value for horseshoe

15
13
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